[ 72.781585][ T26] audit: type=1800 audit(1565570687.599:27): pid=10047 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 72.810437][ T26] audit: type=1800 audit(1565570687.599:28): pid=10047 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 73.492912][ T26] audit: type=1800 audit(1565570688.399:29): pid=10047 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 73.516397][ T26] audit: type=1800 audit(1565570688.399:30): pid=10047 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.55' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 84.153567][T10200] ================================================================== [ 84.161816][T10200] BUG: KASAN: null-ptr-deref in rxrpc_unuse_local+0x23/0x70 [ 84.169079][T10200] Write of size 4 at addr 0000000000000010 by task syz-executor290/10200 [ 84.177650][T10200] [ 84.180080][T10200] CPU: 0 PID: 10200 Comm: syz-executor290 Not tainted 5.3.0-rc3+ #158 [ 84.188213][T10200] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 84.198377][T10200] Call Trace: [ 84.201684][T10200] dump_stack+0x172/0x1f0 [ 84.206035][T10200] ? rxrpc_unuse_local+0x23/0x70 [ 84.210958][T10200] ? rxrpc_unuse_local+0x23/0x70 [ 84.215902][T10200] __kasan_report.cold+0x5/0x36 [ 84.220747][T10200] ? _raw_read_unlock_irqrestore+0xc1/0xe0 [ 84.226537][T10200] ? rxrpc_unuse_local+0x23/0x70 [ 84.231477][T10200] kasan_report+0x12/0x17 [ 84.235802][T10200] check_memory_region+0x134/0x1a0 [ 84.240902][T10200] __kasan_check_write+0x14/0x20 [ 84.245833][T10200] rxrpc_unuse_local+0x23/0x70 [ 84.250576][T10200] rxrpc_release+0x47d/0x840 [ 84.255175][T10200] __sock_release+0xce/0x280 [ 84.259782][T10200] sock_close+0x1e/0x30 [ 84.264132][T10200] __fput+0x2ff/0x890 [ 84.268213][T10200] ? __sock_release+0x280/0x280 [ 84.273042][T10200] ____fput+0x16/0x20 [ 84.277030][T10200] task_work_run+0x145/0x1c0 [ 84.281610][T10200] do_exit+0x92f/0x2e50 [ 84.285758][T10200] ? __sanitizer_cov_trace_const_cmp4+0x11/0x20 [ 84.292041][T10200] ? mm_update_next_owner+0x640/0x640 [ 84.297446][T10200] ? fd_install+0x4d/0x60 [ 84.301805][T10200] ? __sys_socket+0x180/0x220 [ 84.306608][T10200] ? move_addr_to_kernel+0x80/0x80 [ 84.311799][T10200] ? __ia32_sys_fallocate+0xf0/0xf0 [ 84.317081][T10200] do_group_exit+0x135/0x360 [ 84.321650][T10200] __x64_sys_exit_group+0x44/0x50 [ 84.326829][T10200] do_syscall_64+0xfd/0x6a0 [ 84.331321][T10200] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 84.337425][T10200] RIP: 0033:0x43ed68 [ 84.341317][T10200] Code: Bad RIP value. [ 84.345409][T10200] RSP: 002b:00007ffc2bf7b208 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 84.353803][T10200] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ed68 [ 84.361758][T10200] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 84.369847][T10200] RBP: 00000000004be568 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 84.377800][T10200] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001 [ 84.385895][T10200] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 84.393919][T10200] ================================================================== [ 84.402619][T10200] Kernel panic - not syncing: panic_on_warn set ... [ 84.409392][T10200] CPU: 0 PID: 10200 Comm: syz-executor290 Tainted: G B 5.3.0-rc3+ #158 [ 84.418951][T10200] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 84.428988][T10200] Call Trace: [ 84.432269][T10200] dump_stack+0x172/0x1f0 [ 84.436706][T10200] panic+0x2dc/0x755 [ 84.440580][T10200] ? add_taint.cold+0x16/0x16 [ 84.445232][T10200] ? rxrpc_unuse_local+0x23/0x70 [ 84.450258][T10200] ? preempt_schedule+0x4b/0x60 [ 84.455095][T10200] ? ___preempt_schedule+0x16/0x20 [ 84.460202][T10200] ? trace_hardirqs_on+0x5e/0x240 [ 84.465448][T10200] ? rxrpc_unuse_local+0x23/0x70 [ 84.470460][T10200] end_report+0x47/0x4f [ 84.474608][T10200] ? rxrpc_unuse_local+0x23/0x70 [ 84.479637][T10200] __kasan_report.cold+0xe/0x36 [ 84.484558][T10200] ? _raw_read_unlock_irqrestore+0xc1/0xe0 [ 84.490346][T10200] ? rxrpc_unuse_local+0x23/0x70 [ 84.495268][T10200] kasan_report+0x12/0x17 [ 84.499727][T10200] check_memory_region+0x134/0x1a0 [ 84.504877][T10200] __kasan_check_write+0x14/0x20 [ 84.510034][T10200] rxrpc_unuse_local+0x23/0x70 [ 84.514776][T10200] rxrpc_release+0x47d/0x840 [ 84.519362][T10200] __sock_release+0xce/0x280 [ 84.523949][T10200] sock_close+0x1e/0x30 [ 84.528091][T10200] __fput+0x2ff/0x890 [ 84.532068][T10200] ? __sock_release+0x280/0x280 [ 84.536905][T10200] ____fput+0x16/0x20 [ 84.540912][T10200] task_work_run+0x145/0x1c0 [ 84.545551][T10200] do_exit+0x92f/0x2e50 [ 84.549727][T10200] ? __sanitizer_cov_trace_const_cmp4+0x11/0x20 [ 84.556072][T10200] ? mm_update_next_owner+0x640/0x640 [ 84.561433][T10200] ? fd_install+0x4d/0x60 [ 84.565753][T10200] ? __sys_socket+0x180/0x220 [ 84.570535][T10200] ? move_addr_to_kernel+0x80/0x80 [ 84.575630][T10200] ? __ia32_sys_fallocate+0xf0/0xf0 [ 84.580816][T10200] do_group_exit+0x135/0x360 [ 84.585498][T10200] __x64_sys_exit_group+0x44/0x50 [ 84.590512][T10200] do_syscall_64+0xfd/0x6a0 [ 84.595200][T10200] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 84.601244][T10200] RIP: 0033:0x43ed68 [ 84.605131][T10200] Code: Bad RIP value. [ 84.609286][T10200] RSP: 002b:00007ffc2bf7b208 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 84.617794][T10200] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ed68 [ 84.626147][T10200] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 84.634271][T10200] RBP: 00000000004be568 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 84.642325][T10200] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001 [ 84.650279][T10200] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 84.659673][T10200] Kernel Offset: disabled [ 84.663999][T10200] Rebooting in 86400 seconds..